malcontent/libmalcontent/manager.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
*
* Copyright © 2019 Endless Mobile, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
* - Philip Withnall <withnall@endlessm.com>
*/
#include "config.h"
#include <glib.h>
#include <glib-object.h>
#include <glib/gi18n-lib.h>
#include <gio/gio.h>
#include <libmalcontent/app-filter.h>
#include <libmalcontent/manager.h>
#include <libmalcontent/session-limits.h>
#include "libmalcontent/app-filter-private.h"
#include "libmalcontent/session-limits-private.h"
G_DEFINE_QUARK (MctManagerError, mct_manager_error)
/**
* MctManager:
*
* #MctManager is a top-level management object which is used to query and
* monitor #MctAppFilters for different users.
*
* Since: 0.3.0
*/
struct _MctManager
{
GObject parent_instance;
GDBusConnection *connection; /* (owned) */
guint user_changed_id;
};
G_DEFINE_TYPE (MctManager, mct_manager, G_TYPE_OBJECT)
typedef enum
{
PROP_CONNECTION = 1,
} MctManagerProperty;
static GParamSpec *props[PROP_CONNECTION + 1] = { NULL, };
static void
mct_manager_init (MctManager *self)
{
/* Nothing to do here. */
}
static void
mct_manager_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *spec)
{
MctManager *self = MCT_MANAGER (object);
switch ((MctManagerProperty) property_id)
{
case PROP_CONNECTION:
g_value_set_object (value, self->connection);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, spec);
break;
}
}
static void
mct_manager_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *spec)
{
MctManager *self = MCT_MANAGER (object);
switch ((MctManagerProperty) property_id)
{
case PROP_CONNECTION:
/* Construct-only. May not be %NULL. */
g_assert (self->connection == NULL);
self->connection = g_value_dup_object (value);
g_assert (self->connection != NULL);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, spec);
break;
}
}
static void _mct_manager_user_changed_cb (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data);
static void
mct_manager_constructed (GObject *object)
{
MctManager *self = MCT_MANAGER (object);
/* Chain up. */
G_OBJECT_CLASS (mct_manager_parent_class)->constructed (object);
/* Connect to notifications from AccountsService. */
g_assert (self->connection != NULL);
self->user_changed_id =
g_dbus_connection_signal_subscribe (self->connection,
"org.freedesktop.Accounts", /* sender */
"org.freedesktop.Accounts.User", /* interface name */
"Changed", /* signal name */
NULL, /* object path */
NULL, /* arg0 */
G_DBUS_SIGNAL_FLAGS_NONE,
_mct_manager_user_changed_cb,
self, NULL);
}
static void
mct_manager_dispose (GObject *object)
{
MctManager *self = MCT_MANAGER (object);
if (self->user_changed_id != 0 && self->connection != NULL)
{
g_dbus_connection_signal_unsubscribe (self->connection,
self->user_changed_id);
self->user_changed_id = 0;
}
g_clear_object (&self->connection);
G_OBJECT_CLASS (mct_manager_parent_class)->dispose (object);
}
static void
mct_manager_class_init (MctManagerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = mct_manager_constructed;
object_class->dispose = mct_manager_dispose;
object_class->get_property = mct_manager_get_property;
object_class->set_property = mct_manager_set_property;
/**
* MctManager:connection: (not nullable)
*
* A connection to the system bus, where accounts-service runs. Its provided
* mostly for testing purposes, or to allow an existing connection to be
* re-used.
*
* Since: 0.3.0
*/
props[PROP_CONNECTION] = g_param_spec_object ("connection",
"D-Bus Connection",
"A connection to the system bus.",
G_TYPE_DBUS_CONNECTION,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class,
G_N_ELEMENTS (props),
props);
/**
* MctManager::app-filter-changed:
* @self: a #MctManager
* @user_id: UID of the user whose app filter has changed
*
* Emitted when the app filter stored for a user changes.
* The new app filter for the user should be requested again from
* the #MctManager instance.
*
* Since: 0.3.0
*/
g_signal_new ("app-filter-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0, NULL, NULL, NULL,
G_TYPE_NONE, 1,
G_TYPE_UINT64);
}
/**
* mct_manager_new:
* @connection: (transfer none): a #GDBusConnection to use
*
* Create a new #MctManager.
*
* Returns: (transfer full): a new #MctManager
* Since: 0.3.0
*/
MctManager *
mct_manager_new (GDBusConnection *connection)
{
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
return g_object_new (MCT_TYPE_MANAGER,
"connection", connection,
NULL);
}
static void
_mct_manager_user_changed_cb (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
MctManager *manager = MCT_MANAGER (user_data);
g_autoptr(GError) local_error = NULL;
const gchar *uid_str;
guint64 uid;
g_assert (g_str_equal (interface_name, "org.freedesktop.Accounts.User"));
g_assert (g_str_equal (signal_name, "Changed"));
/* Extract the UID from the object path. This is a bit hacky, but probably
* better than depending on libaccountsservice just for this. */
if (!g_str_has_prefix (object_path, "/org/freedesktop/Accounts/User"))
return;
uid_str = object_path + strlen ("/org/freedesktop/Accounts/User");
if (!g_ascii_string_to_unsigned (uid_str, 10, 0, G_MAXUINT64, &uid, &local_error))
{
g_warning ("Error converting object path %s to user ID: %s",
object_path, local_error->message);
g_clear_error (&local_error);
}
g_signal_emit_by_name (manager, "app-filter-changed", uid);
}
/* Check if @error is a D-Bus remote error matching @expected_error_name. */
static gboolean
bus_remote_error_matches (const GError *error,
const gchar *expected_error_name)
{
g_autofree gchar *error_name = NULL;
if (!g_dbus_error_is_remote_error (error))
return FALSE;
error_name = g_dbus_error_get_remote_error (error);
return g_str_equal (error_name, expected_error_name);
}
/* Convert a #GDBusError into a #MctManagerError. */
static GError *
bus_error_to_manager_error (const GError *bus_error,
uid_t user_id)
{
if (g_error_matches (bus_error, G_DBUS_ERROR, G_DBUS_ERROR_ACCESS_DENIED) ||
bus_remote_error_matches (bus_error, "org.freedesktop.Accounts.Error.PermissionDenied"))
return g_error_new (MCT_MANAGER_ERROR, MCT_MANAGER_ERROR_PERMISSION_DENIED,
_("Not allowed to query parental controls data for user %u"),
(guint) user_id);
else if (g_error_matches (bus_error, G_DBUS_ERROR, G_DBUS_ERROR_UNKNOWN_METHOD) ||
bus_remote_error_matches (bus_error, "org.freedesktop.Accounts.Error.Failed"))
return g_error_new (MCT_MANAGER_ERROR, MCT_MANAGER_ERROR_INVALID_USER,
_("User %u does not exist"), (guint) user_id);
else if (g_error_matches (bus_error, G_DBUS_ERROR, G_DBUS_ERROR_SERVICE_UNKNOWN) ||
g_error_matches (bus_error, G_DBUS_ERROR, G_DBUS_ERROR_NAME_HAS_NO_OWNER))
/* If accountsservice is not available on the system bus, then the
* com.endlessm.ParentalControls.AppFilter extension interface
* certainly can't be available. */
return g_error_new_literal (MCT_MANAGER_ERROR,
MCT_MANAGER_ERROR_DISABLED,
_("System accounts service not available"));
else
return g_error_copy (bus_error);
}
/* Find the object path for the given @user_id on the accountsservice D-Bus
* interface, by calling its FindUserById() method. This is a synchronous,
* blocking function. */
static gchar *
accounts_find_user_by_id (GDBusConnection *connection,
uid_t user_id,
gboolean allow_interactive_authorization,
GCancellable *cancellable,
GError **error)
{
g_autofree gchar *object_path = NULL;
g_autoptr(GVariant) result_variant = NULL;
g_autoptr(GError) local_error = NULL;
result_variant =
g_dbus_connection_call_sync (connection,
"org.freedesktop.Accounts",
"/org/freedesktop/Accounts",
"org.freedesktop.Accounts",
"FindUserById",
g_variant_new ("(x)", (gint64) user_id),
G_VARIANT_TYPE ("(o)"),
allow_interactive_authorization
? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
: G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout, ms */
cancellable,
&local_error);
if (local_error != NULL)
{
g_autoptr(GError) app_filter_error = bus_error_to_manager_error (local_error,
user_id);
g_propagate_error (error, g_steal_pointer (&app_filter_error));
return NULL;
}
g_variant_get (result_variant, "(o)", &object_path);
return g_steal_pointer (&object_path);
}
/**
* mct_manager_get_app_filter:
* @self: a #MctManager
* @user_id: ID of the user to query, typically coming from getuid()
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: return location for a #GError, or %NULL
*
* Synchronous version of mct_manager_get_app_filter_async().
*
* Returns: (transfer full): app filter for the queried user
* Since: 0.3.0
*/
MctAppFilter *
mct_manager_get_app_filter (MctManager *self,
uid_t user_id,
MctManagerGetValueFlags flags,
GCancellable *cancellable,
GError **error)
{
g_autofree gchar *object_path = NULL;
g_autoptr(GVariant) result_variant = NULL;
g_autoptr(GVariant) properties = NULL;
g_autoptr(GError) local_error = NULL;
g_return_val_if_fail (MCT_IS_MANAGER (self), NULL);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
object_path = accounts_find_user_by_id (self->connection, user_id,
(flags & MCT_MANAGER_GET_VALUE_FLAGS_INTERACTIVE),
cancellable, error);
if (object_path == NULL)
return NULL;
result_variant =
g_dbus_connection_call_sync (self->connection,
"org.freedesktop.Accounts",
object_path,
"org.freedesktop.DBus.Properties",
"GetAll",
g_variant_new ("(s)", "com.endlessm.ParentalControls.AppFilter"),
G_VARIANT_TYPE ("(a{sv})"),
(flags & MCT_MANAGER_GET_VALUE_FLAGS_INTERACTIVE)
? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
: G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout, ms */
cancellable,
&local_error);
if (local_error != NULL)
{
g_autoptr(GError) manager_error = NULL;
if (g_error_matches (local_error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS))
{
/* o.fd.D.GetAll() will return InvalidArgs errors if
* accountsservice doesnt have the com.endlessm.ParentalControls.AppFilter
* extension interface installed. */
manager_error = g_error_new_literal (MCT_MANAGER_ERROR,
MCT_MANAGER_ERROR_DISABLED,
_("App filtering is globally disabled"));
}
else
{
manager_error = bus_error_to_manager_error (local_error, user_id);
}
g_propagate_error (error, g_steal_pointer (&manager_error));
return NULL;
}
/* Extract the properties we care about. They may be silently omitted from the
* results if we dont have permission to access them. */
properties = g_variant_get_child_value (result_variant, 0);
if (!g_variant_lookup (properties, "AppFilter", "(b^as)", NULL, NULL))
{
g_set_error (error, MCT_MANAGER_ERROR,
MCT_MANAGER_ERROR_PERMISSION_DENIED,
_("Not allowed to query parental controls data for user %u"),
(guint) user_id);
return NULL;
}
return mct_app_filter_deserialize (properties, user_id, error);
}
static void get_app_filter_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable);
typedef struct
{
uid_t user_id;
MctManagerGetValueFlags flags;
} GetAppFilterData;
static void
get_app_filter_data_free (GetAppFilterData *data)
{
g_free (data);
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC (GetAppFilterData, get_app_filter_data_free)
/**
* mct_manager_get_app_filter_async:
* @self: a #MctManager
* @user_id: ID of the user to query, typically coming from getuid()
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: a #GAsyncReadyCallback
* @user_data: user data to pass to @callback
*
* Asynchronously get a snapshot of the app filter settings for the given
* @user_id.
*
* On failure, an #MctManagerError, a #GDBusError or a #GIOError will be
* returned.
*
* Since: 0.3.0
*/
void
mct_manager_get_app_filter_async (MctManager *self,
uid_t user_id,
MctManagerGetValueFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
g_autoptr(GetAppFilterData) data = NULL;
g_return_if_fail (MCT_IS_MANAGER (self));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_source_tag (task, mct_manager_get_app_filter_async);
data = g_new0 (GetAppFilterData, 1);
data->user_id = user_id;
data->flags = flags;
g_task_set_task_data (task, g_steal_pointer (&data),
(GDestroyNotify) get_app_filter_data_free);
g_task_run_in_thread (task, get_app_filter_thread_cb);
}
static void
get_app_filter_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
g_autoptr(MctAppFilter) filter = NULL;
MctManager *manager = MCT_MANAGER (source_object);
GetAppFilterData *data = task_data;
g_autoptr(GError) local_error = NULL;
filter = mct_manager_get_app_filter (manager, data->user_id,
data->flags,
cancellable, &local_error);
if (local_error != NULL)
g_task_return_error (task, g_steal_pointer (&local_error));
else
g_task_return_pointer (task, g_steal_pointer (&filter),
(GDestroyNotify) mct_app_filter_unref);
}
/**
* mct_manager_get_app_filter_finish:
* @self: a #MctManager
* @result: a #GAsyncResult
* @error: return location for a #GError, or %NULL
*
* Finish an asynchronous operation to get the app filter for a user, started
* with mct_manager_get_app_filter_async().
*
* Returns: (transfer full): app filter for the queried user
* Since: 0.3.0
*/
MctAppFilter *
mct_manager_get_app_filter_finish (MctManager *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (MCT_IS_MANAGER (self), NULL);
g_return_val_if_fail (g_task_is_valid (result, self), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* mct_manager_set_app_filter:
* @self: a #MctManager
* @user_id: ID of the user to set the filter for, typically coming from getuid()
* @app_filter: (transfer none): the app filter to set for the user
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: return location for a #GError, or %NULL
*
* Synchronous version of mct_manager_set_app_filter_async().
*
* Returns: %TRUE on success, %FALSE otherwise
* Since: 0.3.0
*/
gboolean
mct_manager_set_app_filter (MctManager *self,
uid_t user_id,
MctAppFilter *app_filter,
MctManagerSetValueFlags flags,
GCancellable *cancellable,
GError **error)
{
g_autofree gchar *object_path = NULL;
g_autoptr(GVariant) properties_variant = NULL;
g_autoptr(GVariant) properties_value = NULL;
const gchar *properties_key = NULL;
GVariantIter iter;
g_autoptr(GError) local_error = NULL;
g_return_val_if_fail (MCT_IS_MANAGER (self), FALSE);
g_return_val_if_fail (app_filter != NULL, FALSE);
g_return_val_if_fail (app_filter->ref_count >= 1, FALSE);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
object_path = accounts_find_user_by_id (self->connection, user_id,
(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE),
cancellable, error);
if (object_path == NULL)
return FALSE;
properties_variant = mct_app_filter_serialize (app_filter);
g_variant_iter_init (&iter, properties_variant);
while (g_variant_iter_loop (&iter, "{&sv}", &properties_key, &properties_value))
{
g_autoptr(GVariant) result_variant = NULL;
result_variant =
g_dbus_connection_call_sync (self->connection,
"org.freedesktop.Accounts",
object_path,
"org.freedesktop.DBus.Properties",
"Set",
g_variant_new ("(ssv)",
"com.endlessm.ParentalControls.AppFilter",
properties_key,
properties_value),
G_VARIANT_TYPE ("()"),
(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE)
? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
: G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout, ms */
cancellable,
&local_error);
if (local_error != NULL)
{
g_propagate_error (error, bus_error_to_manager_error (local_error, user_id));
return FALSE;
}
}
return TRUE;
}
static void set_app_filter_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable);
typedef struct
{
uid_t user_id;
MctAppFilter *app_filter; /* (owned) */
MctManagerSetValueFlags flags;
} SetAppFilterData;
static void
set_app_filter_data_free (SetAppFilterData *data)
{
mct_app_filter_unref (data->app_filter);
g_free (data);
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC (SetAppFilterData, set_app_filter_data_free)
/**
* mct_manager_set_app_filter_async:
* @self: a #MctManager
* @user_id: ID of the user to set the filter for, typically coming from getuid()
* @app_filter: (transfer none): the app filter to set for the user
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: a #GAsyncReadyCallback
* @user_data: user data to pass to @callback
*
* Asynchronously set the app filter settings for the given @user_id to the
* given @app_filter instance. This will set all fields of the app filter.
*
* On failure, an #MctManagerError, a #GDBusError or a #GIOError will be
* returned. The users app filter settings will be left in an undefined state.
*
* Since: 0.3.0
*/
void
mct_manager_set_app_filter_async (MctManager *self,
uid_t user_id,
MctAppFilter *app_filter,
MctManagerSetValueFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
g_autoptr(SetAppFilterData) data = NULL;
g_return_if_fail (MCT_IS_MANAGER (self));
g_return_if_fail (app_filter != NULL);
g_return_if_fail (app_filter->ref_count >= 1);
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_source_tag (task, mct_manager_set_app_filter_async);
data = g_new0 (SetAppFilterData, 1);
data->user_id = user_id;
data->app_filter = mct_app_filter_ref (app_filter);
data->flags = flags;
g_task_set_task_data (task, g_steal_pointer (&data),
(GDestroyNotify) set_app_filter_data_free);
g_task_run_in_thread (task, set_app_filter_thread_cb);
}
static void
set_app_filter_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
gboolean success;
MctManager *manager = MCT_MANAGER (source_object);
SetAppFilterData *data = task_data;
g_autoptr(GError) local_error = NULL;
success = mct_manager_set_app_filter (manager, data->user_id,
data->app_filter, data->flags,
cancellable, &local_error);
if (local_error != NULL)
g_task_return_error (task, g_steal_pointer (&local_error));
else
g_task_return_boolean (task, success);
}
/**
* mct_manager_set_app_filter_finish:
* @self: a #MctManager
* @result: a #GAsyncResult
* @error: return location for a #GError, or %NULL
*
* Finish an asynchronous operation to set the app filter for a user, started
* with mct_manager_set_app_filter_async().
*
* Returns: %TRUE on success, %FALSE otherwise
* Since: 0.3.0
*/
gboolean
mct_manager_set_app_filter_finish (MctManager *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (MCT_IS_MANAGER (self), FALSE);
g_return_val_if_fail (g_task_is_valid (result, self), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* mct_manager_get_session_limits:
* @self: a #MctManager
* @user_id: ID of the user to query, typically coming from getuid()
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: return location for a #GError, or %NULL
*
* Synchronous version of mct_manager_get_session_limits_async().
*
* Returns: (transfer full): session limits for the queried user
* Since: 0.5.0
*/
MctSessionLimits *
mct_manager_get_session_limits (MctManager *self,
uid_t user_id,
MctManagerGetValueFlags flags,
GCancellable *cancellable,
GError **error)
{
g_autofree gchar *object_path = NULL;
g_autoptr(GVariant) result_variant = NULL;
g_autoptr(GVariant) properties = NULL;
g_autoptr(GError) local_error = NULL;
g_return_val_if_fail (MCT_IS_MANAGER (self), NULL);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
object_path = accounts_find_user_by_id (self->connection, user_id,
(flags & MCT_MANAGER_GET_VALUE_FLAGS_INTERACTIVE),
cancellable, error);
if (object_path == NULL)
return NULL;
result_variant =
g_dbus_connection_call_sync (self->connection,
"org.freedesktop.Accounts",
object_path,
"org.freedesktop.DBus.Properties",
"GetAll",
g_variant_new ("(s)", "com.endlessm.ParentalControls.SessionLimits"),
G_VARIANT_TYPE ("(a{sv})"),
(flags & MCT_MANAGER_GET_VALUE_FLAGS_INTERACTIVE)
? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
: G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout, ms */
cancellable,
&local_error);
if (local_error != NULL)
{
g_autoptr(GError) manager_error = NULL;
if (g_error_matches (local_error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS))
{
/* o.fd.D.GetAll() will return InvalidArgs errors if
* accountsservice doesnt have the com.endlessm.ParentalControls.SessionLimits
* extension interface installed. */
manager_error = g_error_new_literal (MCT_MANAGER_ERROR,
MCT_MANAGER_ERROR_DISABLED,
_("Session limits are globally disabled"));
}
else
{
manager_error = bus_error_to_manager_error (local_error, user_id);
}
g_propagate_error (error, g_steal_pointer (&manager_error));
return NULL;
}
/* Extract the properties we care about. They may be silently omitted from the
* results if we dont have permission to access them. */
properties = g_variant_get_child_value (result_variant, 0);
if (!g_variant_lookup (properties, "LimitType", "u", NULL))
{
g_set_error (error, MCT_MANAGER_ERROR,
MCT_MANAGER_ERROR_PERMISSION_DENIED,
_("Not allowed to query parental controls data for user %u"),
(guint) user_id);
return NULL;
}
return mct_session_limits_deserialize (properties, user_id, error);
}
static void get_session_limits_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable);
typedef struct
{
uid_t user_id;
MctManagerGetValueFlags flags;
} GetSessionLimitsData;
static void
get_session_limits_data_free (GetSessionLimitsData *data)
{
g_free (data);
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC (GetSessionLimitsData, get_session_limits_data_free)
/**
* mct_manager_get_session_limits_async:
* @self: a #MctManager
* @user_id: ID of the user to query, typically coming from getuid()
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: a #GAsyncReadyCallback
* @user_data: user data to pass to @callback
*
* Asynchronously get a snapshot of the session limit settings for the given
* @user_id.
*
* On failure, an #MctManagerError, a #GDBusError or a #GIOError will be
* returned via mct_manager_get_session_limits_finish().
*
* Since: 0.5.0
*/
void
mct_manager_get_session_limits_async (MctManager *self,
uid_t user_id,
MctManagerGetValueFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
g_autoptr(GetSessionLimitsData) data = NULL;
g_return_if_fail (MCT_IS_MANAGER (self));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_source_tag (task, mct_manager_get_session_limits_async);
data = g_new0 (GetSessionLimitsData, 1);
data->user_id = user_id;
data->flags = flags;
g_task_set_task_data (task, g_steal_pointer (&data),
(GDestroyNotify) get_session_limits_data_free);
g_task_run_in_thread (task, get_session_limits_thread_cb);
}
static void
get_session_limits_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
g_autoptr(MctSessionLimits) limits = NULL;
MctManager *manager = MCT_MANAGER (source_object);
GetSessionLimitsData *data = task_data;
g_autoptr(GError) local_error = NULL;
limits = mct_manager_get_session_limits (manager, data->user_id,
data->flags,
cancellable, &local_error);
if (local_error != NULL)
g_task_return_error (task, g_steal_pointer (&local_error));
else
g_task_return_pointer (task, g_steal_pointer (&limits),
(GDestroyNotify) mct_session_limits_unref);
}
/**
* mct_manager_get_session_limits_finish:
* @self: a #MctManager
* @result: a #GAsyncResult
* @error: return location for a #GError, or %NULL
*
* Finish an asynchronous operation to get the session limits for a user,
* started with mct_manager_get_session_limits_async().
*
* Returns: (transfer full): session limits for the queried user
* Since: 0.5.0
*/
MctSessionLimits *
mct_manager_get_session_limits_finish (MctManager *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (MCT_IS_MANAGER (self), NULL);
g_return_val_if_fail (g_task_is_valid (result, self), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* mct_manager_set_session_limits:
* @self: a #MctManager
* @user_id: ID of the user to set the limits for, typically coming from getuid()
* @session_limits: (transfer none): the session limits to set for the user
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: return location for a #GError, or %NULL
*
* Synchronous version of mct_manager_set_session_limits_async().
*
* Returns: %TRUE on success, %FALSE otherwise
* Since: 0.5.0
*/
gboolean
mct_manager_set_session_limits (MctManager *self,
uid_t user_id,
MctSessionLimits *session_limits,
MctManagerSetValueFlags flags,
GCancellable *cancellable,
GError **error)
{
g_autofree gchar *object_path = NULL;
g_autoptr(GVariant) limit_type_variant = NULL;
g_autoptr(GVariant) limit_type_result_variant = NULL;
g_autoptr(GVariant) properties_variant = NULL;
g_autoptr(GVariant) properties_value = NULL;
const gchar *properties_key = NULL;
GVariantIter iter;
g_autoptr(GError) local_error = NULL;
g_return_val_if_fail (MCT_IS_MANAGER (self), FALSE);
g_return_val_if_fail (session_limits != NULL, FALSE);
g_return_val_if_fail (session_limits->ref_count >= 1, FALSE);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
object_path = accounts_find_user_by_id (self->connection, user_id,
(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE),
cancellable, error);
if (object_path == NULL)
return FALSE;
properties_variant = mct_session_limits_serialize (session_limits);
g_variant_iter_init (&iter, properties_variant);
while (g_variant_iter_loop (&iter, "{&sv}", &properties_key, &properties_value))
{
g_autoptr(GVariant) result_variant = NULL;
/* Change the limit type last, so all the details of the new limit are
* correct by the time its changed over. */
if (g_str_equal (properties_key, "LimitType"))
{
limit_type_variant = g_steal_pointer (&properties_value);
continue;
}
result_variant =
g_dbus_connection_call_sync (self->connection,
"org.freedesktop.Accounts",
object_path,
"org.freedesktop.DBus.Properties",
"Set",
g_variant_new ("(ssv)",
"com.endlessm.ParentalControls.SessionLimits",
properties_key,
properties_value),
G_VARIANT_TYPE ("()"),
(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE)
? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
: G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout, ms */
cancellable,
&local_error);
if (local_error != NULL)
{
g_propagate_error (error, bus_error_to_manager_error (local_error, user_id));
return FALSE;
}
}
limit_type_result_variant =
g_dbus_connection_call_sync (self->connection,
"org.freedesktop.Accounts",
object_path,
"org.freedesktop.DBus.Properties",
"Set",
g_variant_new ("(ssv)",
"com.endlessm.ParentalControls.SessionLimits",
"LimitType",
limit_type_variant),
G_VARIANT_TYPE ("()"),
(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE)
? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
: G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout, ms */
cancellable,
&local_error);
if (local_error != NULL)
{
g_propagate_error (error, bus_error_to_manager_error (local_error, user_id));
return FALSE;
}
return TRUE;
}
static void set_session_limits_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable);
typedef struct
{
uid_t user_id;
MctSessionLimits *session_limits; /* (owned) */
MctManagerSetValueFlags flags;
} SetSessionLimitsData;
static void
set_session_limits_data_free (SetSessionLimitsData *data)
{
mct_session_limits_unref (data->session_limits);
g_free (data);
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC (SetSessionLimitsData, set_session_limits_data_free)
/**
* mct_manager_set_session_limits_async:
* @self: a #MctManager
* @user_id: ID of the user to set the limits for, typically coming from getuid()
* @session_limits: (transfer none): the session limits to set for the user
* @flags: flags to affect the behaviour of the call
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: a #GAsyncReadyCallback
* @user_data: user data to pass to @callback
*
* Asynchronously set the session limits settings for the given @user_id to the
* given @session_limits instance.
*
* On failure, an #MctManagerError, a #GDBusError or a #GIOError will be
* returned via mct_manager_set_session_limits_finish(). The users session
* limits settings will be left in an undefined state.
*
* Since: 0.5.0
*/
void
mct_manager_set_session_limits_async (MctManager *self,
uid_t user_id,
MctSessionLimits *session_limits,
MctManagerSetValueFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
g_autoptr(SetSessionLimitsData) data = NULL;
g_return_if_fail (MCT_IS_MANAGER (self));
g_return_if_fail (session_limits != NULL);
g_return_if_fail (session_limits->ref_count >= 1);
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_source_tag (task, mct_manager_set_session_limits_async);
data = g_new0 (SetSessionLimitsData, 1);
data->user_id = user_id;
data->session_limits = mct_session_limits_ref (session_limits);
data->flags = flags;
g_task_set_task_data (task, g_steal_pointer (&data),
(GDestroyNotify) set_session_limits_data_free);
g_task_run_in_thread (task, set_session_limits_thread_cb);
}
static void
set_session_limits_thread_cb (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
gboolean success;
MctManager *manager = MCT_MANAGER (source_object);
SetSessionLimitsData *data = task_data;
g_autoptr(GError) local_error = NULL;
success = mct_manager_set_session_limits (manager, data->user_id,
data->session_limits, data->flags,
cancellable, &local_error);
if (local_error != NULL)
g_task_return_error (task, g_steal_pointer (&local_error));
else
g_task_return_boolean (task, success);
}
/**
* mct_manager_set_session_limits_finish:
* @self: a #MctManager
* @result: a #GAsyncResult
* @error: return location for a #GError, or %NULL
*
* Finish an asynchronous operation to set the session limits for a user,
* started with mct_manager_set_session_limits_async().
*
* Returns: %TRUE on success, %FALSE otherwise
* Since: 0.5.0
*/
gboolean
mct_manager_set_session_limits_finish (MctManager *self,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (MCT_IS_MANAGER (self), FALSE);
g_return_val_if_fail (g_task_is_valid (result, self), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
return g_task_propagate_boolean (G_TASK (result), error);
}